1. Warsaw School of Social Sciences and Humanities, Wroclaw, Poland
2. University of Nottingham, Nottingham, UK
3. MRC Unit for Lifelong Health and Ageing, London, UK
4. University of Turku and Turku University Hospital, Turku, Finland
5. Finnish Institute of Occupational Health, Helsinki, Finland
6. National Institute for Health and Welfare, Helsinki, Finland
7. University of Michigan, Ann Arbor, MI, USA
8. University College London, London, UK
9. University of Helsinki, Helsinki, Finland